A GRiPping Tale

A yellow composite door
A grey composite door

Sternfenster is now able to tell a tale of the doors is supplies being constructed using the latest GRiPCORE technology, which makes them stronger and heavier and unlikely to warp or crack.

They are also warmer and more secure.

GRiPCORE doors, developed by Doorco, are made using a hybrid of cross-laminated engineered hardwood, laminated veneer lumber timber and hardwood stiles and rails, then pressed with 4mm GRP skins. This robust design means these doors will not move, bow or twist more than 3mm and require minimal maintenance.


 “GRiPCORE technology is a fantastic evolution of the composite door. Our doors, built using GRiPCORE technology, iron out many of the irritations that installers have had with traditional composite doors, namely, warping and cracking.”

– Sales director, Sternfenster 



Beating the weather

“Too often you are called back to a job because the homeowner says the door won’t close properly,” continues Sternfenster’s Court. “This is because the temperature on the outside and inside are sometimes wildly different, which puts the door under a lot of thermal stress. The way GRiPCORE doors are engineered irons out those issues and you are left with a product that not only feels substantial, it can tackle the challenges that the great British weather throws at it.”



Homeowners can choose from a range of door styles, colours, and glazing options to create a customised entrance door for many property styles.



GRiPCORE doors can achieve a U-value of 1.0W/m²K or better; and they feature multi-point locking mechanisms and high-grade security hardware.

Sternfenster has a range of marketing literature which showcases all composite door styles and options to help customers choose their dream entrance door.

Sternfenster will be at the FIT Show 2022.

Picture: GRiPCORE doors are now available from Sternfenster.



Article written by Cathryn Ellis
07th April 2022


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